1.

Give chemical tests to distinguish between the following pairs of compound .(a) Phenol and benzoic acid(b) Propanol and propanone(c) Benzoic acid and ethyl benzoate

Answer»

(a)

ReagentPhenolBenzoic acid
Neutral FeCl3Dark-green, grey violet complexNo colour change
NaHCO3 (sol.)No gas evolvesCO2 evolves

(b)

ReagentPropanolPropanone
NaOH + I2 heatNo reactionYellow ppt of CHI3 forms

(c)

Reagent

Benzoic acid

Ethyl benzoate

NaHCO3 (aq)CO2 gas evolves (Effervesence of CO2)No gas evolves


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